Motion Sensor 1 Piece, Wireless Motion Detector Gets Alarms or Triggers Lights To Turn On, Requires Bridge, Battery Included Motion sensors send instant alert notifications to your phone whenever motion is detected. Bridge is required. You can connect sensors to a hub to activate WiFi devices, not just devices. For example, you can set up a scene for a living room light so that it automatically turns on as you walk through the living room. Simple and tool-free installation, 3M adhesive (included) installation saves you time significantly. Place it anywhere in your home, including hallways, bathrooms, kitchens, and more. With 6M detection distance and 110 viewing angle. You can share the sensor with your family to keep an eye on your home together. 3 month history check. Connect the camera to the motion sensor and place the sensor almost anywhere in your home, then you can see what's going on in your home through the camera on the sensor page of the APP.